Some experience in D2 production was
available but further development was
required to provide suitable powder production
conditions for the higher chromium
materials, D2 and OB1. Nevertheless,
the production principles applied to high
speed steel provided a good starting point
and suitable production conditions were
found. Since the powder is proposed as a
standard press and sinter powder, a -100
mesh specification was used ( 160
micron) for the test powder.